Google‎ > ‎Admin Console‎ > ‎

Add/Update managed bookmarks in Chrome settings for Google Apps

In your Admin console ([yourdomainname]) 

select Device Management

Select Chrome Management

Select User Settings

And scroll almost to the end to the section called User Experience

Add the URL and a name for your bookmark, then click the + symbol to add it.

Don’t forget to Save Changes as well.

This will then shortly appear in your Google Apps for Work Bookmark folder